Passover

Passover, or Pesach, is a Jewish festival that celebrates the Exodus from Egypt. It lasts a week, from the "15th day of Nisan" to the "22nd day of Nisan" (21st in Israel and liberal diaspora Jews).

History
More than 3,000 years ago, God aided the Children of Israel in their escape from slavery by inflicting ten plagues upon ancient Egypt. The last of these saw a spirit of the Lord slay every first-born in Egypt, but "pass over" Jewish homes marked with the blood of a slaughtered lamb. The festival celebrates the return of freedom to the enslaved Jewish people.